Effects of anti-bacterial agents, sample preparation and contact time on anti-bacterial efficacy in MDPE film
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Author list: Chammanee P., Sombatsompop K., Kositchaiyong A., Sombatsompop N.
Publisher: Taylor and Francis Group
Publication year: 2009
Journal: Journal of Macromolecular Science Part B Physics (0022-2348)
Volume number: 48
Issue number: 4
Start page: 755
End page: 765
Number of pages: 11
ISSN: 0022-2348
eISSN: 1525-609X
Languages: English-Great Britain (EN-GB)
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Abstract
The anti-bacterial efficacy of medium-density polyethylene (MDPE) with various contents of different anti-bacterial agents was studied with respect to the effects of the anti-bacterial concentration, size and form of MDPE test-specimen, and the contact time. The three anti-bacterial agents used were carbendazim and zinc dimethyl dithiocarbamate (TROYSAN-S88), 2-hydroxypropyl3-piperazinyl-quinoline carboxylic acid methacrylate (HPQM), and silver substituted zeolite (ZEOMIC). The halo and plate-count-agar (PCA) tests were employed to assess the efficacies of the anti-bacterial performance. It was found that the inhibition zone from the halo test was most visible for the HPQM agent; the higher the HPQM content, the greater the inhibition zone. ZEOMIC exhibited no inhibition zone. The PCA test results suggested that after incorporating HPQM agent in the MDPE matrix, the% reductions of E. coli and S. aureus bacteria were as successfully high as 99.9% for all HPQM loadings.
Keywords
antimicrobials, Halo test, Plate count agar
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